Production technology of pet urinal pad having deammoniation function and high saline water absorption ability

ABSTRACT

A production technology of a pet urinal pad having deammoniation function and high saline water absorption ability includes the following steps: (A) milling and sieving natural zeolites to obtain zeolite powder having a particle size smaller than 100 microns; (B) immersing the zeolite powder into 1 mol/L sulfuric acid to process for 10-60 minutes under a processing temperature of 50-80° C.; performing vacuum filtration and drying on the processed zeolite powder to obtain acidulated zeolite; (C) adding 2-10 portions of acidulated zeolite into 100 portions of super absorbent resin, thoroughly and uniformly mixing to obtain a mixture; (D) fitting the mixture formed in last step with wood pulp paper to form a deodorization water absorption layer; and ε covering a PE film and a non-woven fabric on the deodorization water absorption layer to form the pet urinal pad having the deammoniation function and the high saline water absorption ability.

CROSS-REFERENCE TO RELATED APPLICATIONS

This Application claims the priority of Chinese Application No. CN201410577853.1, filed on Oct. 27, 2014, the disclosure of which is incorporated by reference in its entirety.

TECHNICAL FIELD

The present invention relates to a production method for pet urinal pads, and more particularly, to a production methods for pet urinal pads having a deammoniation function and a high saline water absorption ability.

BACKGROUND ART

Presently, with the improvement of people's living standard, pets like cats, dogs or the like have entered the life of people, playing an increasingly important role. People are also demanding more for the sanitation of the pets. But in daily life, it is very troublesome to dispose pet excreta, which requires the pet masters to pay much attention to solve. To protect environments and also create a more comfortable habitat for the pets to meet the animal right demands of the pets, and meanwhile reduce the tedious work of people for sweeping the pets, quite a number of people have use pet urinal mats while raising pets. Super absorbent resin which is a kind of water-swelling type functional polymer material having super-hydrophilic groups is added in the production process of the pet urinal pad, which has the advantages of big water absorption capacity, fast water absorption speed, no dehydration under pressure, strong water retaining capacity and the like. Although the super absorbent resin can absorb water which is several hundred and even several thousand times of the self quantity thereof, it has poorer anti-electrolytic property, and the saline water absorption ability thereof is only about 10% of that of deionized water. The pet urine includes such electrolytes as Na+, K+ and the like, which results in that the pet urine can be completely absorbed only when more super absorbent resins must be added in the pet urinal pad. Since the pet urine includes smelly substances such as urea which can be transformed into ammonia gas, the pet urinal pad is also smelly, and the environmental health will be affected if it is not treated in time.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to: provide a production technology for pet urinal pads having a deammoniation function and a high saline water absorption ability.

To solve the foregoing technical problem, the present invention employs a technical scheme as follows: a production technology of a pet urinal pad having a deammoniation function and a high saline water absorption ability, including the following steps of:

A. milling and sieving natural zeolites to obtain zeolite powder having a particle size smaller than a selected size, such as 1 mm, preferably 500 microns, and more preferably 100 microns;

B. immersing the zeolite powder into 1 mol/L sulfuric acid to process for a selected duration, such as 10-60 minutes, under a selected processing temperature, such as 50-80° C.; performing vacuum filtration and drying on the processed zeolite powder to obtain acidulated zeolite;

C. adding an appropriate amount (such as 1-50 portions, preferably 2-10 portions) of acidulated zeolite into 100 portions of an absorbent resin (any suitable absorbent resins known in the art for et unine pads may be used), thoroughly and uniformly mixing to obtain a mixture;

D. fitting the mixture formed in the previous step with wood pulp paper to form a deodorization water absorption layer; and

E. covering a PE film (base layer) and a non-woven fabric (surface coating layer) on the deodorization water absorption layer to form the pet urinal pad having deammoniation function and high saline water absorption ability.

The present invention has the advantages that: the foregoing production technology of the pet urinal pad having deammoniation function and high saline water absorption ability is only increased with the procedures of powder milling, drying and mixing or the like on the basis of a common pet urinal pad, which may be processed using a common chemical method; therefore, few devices are required, and the operation is simple; excluding conventional urinal pad components, acidulated zeolite powder having deodorization and ion exchange functions is also added, so that the pet urinal pad has deammoniation function and high saline water absorption ability.

DETAILED DESCRIPTION

The concrete contents of the present invention will be described in details hereinafter with references to the specific embodiments.

The production technology of the pet urinal pad having deammoniation function and high saline water absorption ability includes the following steps of:

A milling and sieving natural zeolites to obtain zeolite powder having a particle size smaller than 100 microns;

B immersing the zeolite powder into 1 mol/L sulfuric acid to process for 10-60 minutes under a processing temperature of 50-80° C.; performing vacuum filtration and drying on the processed zeolite powder to obtain acidulated zeolite;

C. adding 2-10 portions of acidulated zeolite into 100 portions of super absorbent resin, thoroughly and uniformly mixing to obtain a mixture;

D. fitting the mixture formed in last step with wood pulp paper to form a deodorization water absorption layer; and

E. covering a PE film on the deodorization water absorption layer as a base layer and a non-woven fabric on the deodorization water absorption layer as a surface coating layer to form the pet urinal pad having deammoniation function and high saline water absorption ability.

The foregoing production technology of the pet urinal pad having deammoniation function and high saline water absorption ability is only increased with the procedures of powder milling, drying and mixing or the like on the basis of a common pet urinal pad, which may be processed using a common chemical method; therefore, few devices are required, and the operation is simple; excluding conventional urinal pad components, acidulated zeolite powder having deodorization and ion exchange functions is also added, so that the pet urinal pad has deammoniation function and high saline water absorption ability.

The zeolite powder contains alkaline metal and alkali earth metal ions; after acidification, these metal ions are substituted by hydrogen ions; when the acidulated zeolite is contacted with the urine, an ion exchange reaction occurs to absorb the inorganic salt part in the urine to reduce the concentration of the inorganic salt in the urine, thus greatly increasing the urine absorption ability of the urinal pad.

The inside of the acidulated zeolite is fully filled with wispy holes and channels, wherein these holes and channels have such ability as ammonia gas absorption ability. Meanwhile, the H+ ion replaced out after the ion exchange reaction of the acidulated zeolite powder enables the urine to keep subacidity, thus making the ammonia in the urine under an NH4+ state and be fixed by super absorbent resin, and reducing the production of ammonia gas.

Embodiment 1

A production technology of a pet urinal pad having deammoniation function and high saline water absorption ability includes the following steps of:

A. milling and sieving natural zeolites to obtain zeolite powder having a particle size smaller than 100 microns;

B. immersing the zeolite powder into 1 mol/L sulfuric acid to process for 10 minutes under a processing temperature of 50° C.; performing vacuum filtration and drying on the processed zeolite powder to obtain acidulated zeolite;

C. adding 2 g of acidulated zeolite into 100 g of super absorbent resin, thoroughly and uniformly mixing to obtain a mixture;

D. fitting the mixture formed in last step with wood pulp paper to form a deodorization water absorption layer; and

E. covering a PE film on the deodorization water absorption layer as a ground fabric and a non-woven fabric on the deodorization water absorption layer as a surface coating layer to form the pet urinal pad having deammoniation function and high saline water absorption ability.

5 g of mixture of the super absorbent resin and acidulated zeolite is weighed and placed in a urine having a certain volume; after the mixture is saturated by absorbing the urine and sieved by a 100-mesh wire screen to drain redundant urine, all the gel mass is weighed and the urine absorption multiplying factor is 85.3 g/g by calculation. The same manner is employed to measure that the saline water absorption multiplying factor of pure super absorbent resin is 60.4 g/g.

4000 ml fresh pet urine is collected and equally divided into 10 portions; five urinal pads above and five common urinal pads (not added with acidulated zeolite) are respectively taken to respectively absorb 200 ml pet urine. The two urinal pads are respectively placed into a 1000 cm3 closed container and the ammonia gas concentrations are determined after 24 hours, wherein the result shows that the average concentration of the ammonia gas in the container placing the urinal pads is 32% of that of the urinal pad placing the common urinal pads.

Embodiment 2

A production technology of a pet urinal pad having deammoniation function and high saline water absorption ability includes the following steps of:

A. milling and sieving natural zeolites to obtain zeolite powder having a particle size smaller than 100 microns;

B. immersing the zeolite powder into 1 mol/L sulfuric acid to process for 20 minutes under a processing temperature of 60° C.; performing vacuum filtration and drying on the processed zeolite powder to obtain acidulated zeolite;

C. adding 4 g of acidulated zeolite into 100 g of super absorbent resin, thoroughly and uniformly mixing to obtain a mixture;

D. fitting the mixture formed in last step with wood pulp paper to form a deodorization water absorption layer; and

E. covering a PE film on the deodorization water absorption layer as a ground fabric and a non-woven fabric on the deodorization water absorption layer as a surface coating layer to form the pet urinal pad having deammoniation function and high saline water absorption ability.

5 g of mixture of the super absorbent resin and acidulated zeolite is weighed and placed in a urine having a certain volume; after the mixture is saturated by absorbing the urine and sieved by a 100-mesh wire screen to drain redundant urine, all the gel mass is weighed and the urine absorption multiplying factor is 96.1 g/g by calculation. The same manner is employed to measure that the saline water absorption multiplying factor of pure super absorbent resin is 60.4 g/g.

4000 ml fresh pet urine is collected and equally divided into 10 portions; five urinal pads above and five common urinal pads (not added with acidulated zeolite) are respectively taken to respectively absorb 200 ml pet urine. The two urinal pads are respectively placed into a 1000 cm3 closed container and the ammonia gas concentrations are determined after 24 hours, wherein the result shows that the average concentration of the ammonia gas in the container placing the urinal pads is 29% of that of the urinal pad placing the common urinal pads.

Embodiment 3

A production technology of a pet urinal pad having deammoniation function and high saline water absorption ability includes the following steps of:

A. milling and sieving natural zeolites to obtain zeolite powder having a particle size smaller than 100 microns;

B. immersing the zeolite powder into 1 mol/L sulfuric acid to process for 30 minutes under a processing temperature of 70° C.; performing vacuum filtration and drying on the processed zeolite powder to obtain acidulated zeolite;

C. adding 6 g of acidulated zeolite into 100 g of super absorbent resin, thoroughly and uniformly mixing to obtain a mixture;

D. fitting the mixture formed in last step with wood pulp paper to form a deodorization water absorption layer; and

E. covering a PE film on the deodorization water absorption layer as a ground fabric and a non-woven fabric on the deodorization water absorption layer as a surface coating layer to form the pet urinal pad having deammoniation function and high saline water absorption ability.

5 g of mixture of the super absorbent resin and acidulated zeolite is weighed and placed in a urine having a certain volume; after the mixture is saturated by absorbing the urine and sieved by a 100-mesh wire screen to drain redundant urine, all the gel mass is weighed and the urine absorption multiplying factor is 110.8 g/g by calculation. The same manner is employed to measure that the saline water absorption multiplying factor of pure super absorbent resin is 60.4 g/g.

4000 ml fresh pet urine is collected and equally divided into 10 portions; five urinal pads above and five common urinal pads (not added with acidulated zeolite) are respectively taken to respectively absorb 200 ml pet urine. The two urinal pads are respectively placed into a 1000 cm3 closed container and the ammonia gas concentrations are determined after 24 hours, wherein the result shows that the average concentration of the ammonia gas in the container placing the urinal pads is 26% of that of the urinal pad placing the common urinal pads.

Embodiment 4

A production technology of a pet urinal pad having deammoniation function and high saline water absorption ability includes the following steps of:

A milling and sieving natural zeolites to obtain zeolite powder having a particle size smaller than 100 microns;

B. immersing the zeolite powder into 1 mol/L sulfuric acid to process for 40 minutes under a processing temperature of 75° C.; performing vacuum filtration and drying on the processed zeolite powder to obtain acidulated zeolite;

C. adding 8 g of acidulated zeolite into 100 g of super absorbent resin, thoroughly and uniformly mixing to obtain a mixture;

D. fitting the mixture formed in last step with wood pulp paper to form a deodorization water absorption layer; and

E. covering a PE film on the deodorization water absorption layer as a ground fabric and a non-woven fabric on the deodorization water absorption layer as a surface coating layer to form the pet urinal pad having deammoniation function and high saline water absorption ability.

5 g of mixture of the super absorbent resin and acidulated zeolite is weighed and placed in a urine having a certain volume; after the mixture is saturated by absorbing the urine and sieved by a 100-mesh wire screen to drain redundant urine, all the gel mass is weighed and the urine absorption multiplying factor is 120.4 g/g by calculation. The same manner is employed to measure that the saline water absorption multiplying factor of pure super absorbent resin is 60.4 g/g.

4000 ml fresh pet urine is collected and equally divided into 10 portions; five urinal pads above and five common urinal pads (not added with acidulated zeolite) are respectively taken to respectively absorb 200 ml pet urine. The two urinal pads are respectively placed into a 1000 cm3 closed container and the ammonia gas concentrations are determined after 24 hours, wherein the result shows that the average concentration of the ammonia gas in the container placing the urinal pads is 25% of that of the urinal pad placing the common urinal pads.

Embodiment 5

A production technology of a pet urinal pad having deammoniation function and high saline water absorption ability includes the following steps of:

A. milling and sieving natural zeolites to obtain zeolite powder having a particle size smaller than 100 microns;

B immersing the zeolite powder into 1 mol/L sulfuric acid to process for 60 minutes under a processing temperature of 80° C.; performing vacuum filtration and drying on the processed zeolite powder to obtain acidulated zeolite;

C. adding 10 g of acidulated zeolite into 100 g of super absorbent resin, thoroughly and uniformly mixing to obtain a mixture;

D. fitting the mixture formed in last step with wood pulp paper to form a deodorization water absorption layer; and

E. covering a PE film on the deodorization water absorption layer as a ground fabric and a non-woven fabric on the deodorization water absorption layer as a surface coating layer to form the pet urinal pad having deammoniation function and high saline water absorption ability.

5 g of mixture of the super absorbent resin and acidulated zeolite is weighed and placed in a urine having a certain volume; after the mixture is saturated by absorbing the urine and sieved by a 100-mesh wire screen to drain redundant urine, all the gel mass is weighed and the urine absorption multiplying factor is 129.8 g/g by calculation. The same manner is employed to measure that the saline water absorption multiplying factor of pure super absorbent resin is 60.4 g/g.

4000 ml fresh pet urine is collected and equally divided into 10 portions; five urinal pads described-above and five conventional urinal pads (without added acidulated zeolite), respectively, are taken to respectively absorb 200 ml pet urine. The two urinal pads are respectively placed into a 1000 cm³ closed container and the ammonia gas concentrations are determined after 24 hours. The result shows that the average concentration of the ammonia gas in the container with the urinal pads of the invention is 24% of that of the container with the conventional urinal pads. 

What is claimed is:
 1. A method for producing a pet urinal pad having a deammoniation function and high saline water absorption ability, comprising the following steps: (A) milling and sieving natural zeolites to obtain zeolite powder having a particle size smaller than 100 microns; (B) immersing the zeolite powder in a sulfuric acid solution to process for 10-60 minutes under a processing temperature of 50-80° C.; performing vacuum filtration and drying on the processed zeolite powder to obtain acidulated zeolite; (C) adding 2-10 portions of acidulated zeolite into 100 portions of a super absorbent resin, thoroughly and uniformly mixing to obtain a mixture; (D) fitting the mixture formed in step (C) with wood pulp paper to form a deodorization water absorption layer; and (E) covering a PE film as a base layer on the deodorization water absorption layer and a non-woven fabric as a surface covering layer on the deodorization water absorption layer to form the pet urinal pad.
 2. The method according to claim 1, wherein the sulfuric acid solution has a concentration of 1 mol/L. 